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Mixed Ionic-Electronic Conductivity, Redox Behavior and Thermochemical Expansion of Mn-Substituted 5YSZ as an Interlayer Material for Reversible Solid Oxide Cells
dc.contributor.author | Natoli, Alejandro | |
dc.contributor.author | Arias-Serrano, Blanca I. | |
dc.contributor.author | Rodríguez-Castellón, Enrique | |
dc.contributor.author | Żurawska, Agnieszka | |
dc.contributor.author | Frade, Jorge R. | |
dc.contributor.author | Yaremchenko, Aleksey. A. | |
dc.date.accessioned | 2022-09-19T07:12:21Z | |
dc.date.available | 2022-09-19T07:12:21Z | |
dc.date.issued | 2021-01-30 | |
dc.identifier.citation | Natoli A, Arias-Serrano BI, Rodríguez-Castellón E, Żurawska A, Frade JR, Yaremchenko AA. Mixed Ionic-Electronic Conductivity, Redox Behavior and Thermochemical Expansion of Mn-Substituted 5YSZ as an Interlayer Material for Reversible Solid Oxide Cells. Materials. 2021; 14(3):641. https://doi.org/10.3390/ma14030641 | es_ES |
dc.identifier.uri | https://hdl.handle.net/10630/25023 | |
dc.description.abstract | Manganese-substituted 5 mol.% yttria-stabilized zirconia (5YSZ) was explored as a prospective material for protective interlayers between electrolyte and oxygen electrodes in reversible solid oxide fuel/electrolysis cells. [(ZrO2)0.95(Y2O3)0.05]1−x[MnOy]x (x = 0.05, 0.10 and 0.15) ceramics with cubic fluorite structure were sintered in air at 1600 °C. The characterization included X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), thermogravimetry and dilatometry in controlled atmospheres, electrical conductivity measurements, and determination of oxygen-ion transference numbers by the electromotive force (EMF) technique. Mn-substituted 5YSZ solid solutions exhibit variable oxygen nonstoichiometry with manganese cations in a mixed 2+/3+ oxidation state under oxidizing conditions. Substitution by manganese gradually increases the extent of oxygen content variation on thermal/redox cycling, chemical contribution to thermal expansion and dimensional changes on reduction. It also deteriorates oxygen-ionic conductivity and improves p-type electronic conductivity under oxidizing conditions, leading to a gradual transformation from predominantly ionic to prevailing electronic transport with increasing x. Mn2+/3+→Mn2+ transformation under reducing atmospheres is accompanied by the suppression of electronic transport and an increase in ionic conductivity. All Mn-substituted 5YSZ ceramics are solid electrolytes under reducing conditions. Prolonged treatments in reducing atmospheres, however, promote microstructural changes at the surface of bulk ceramics and Mn exsolution. Mn-substituted 5YSZ with 0.05 ≤ x < 0.10 is considered the most suitable for the interlayer application, due to the best combination of relevant factors, including oxygen content variations, levels of ionic/electronic conductivity and thermochemical expansion | es_ES |
dc.description.sponsorship | PhD scholarship of A.N. is funded by the FCT (grant SFRH/BD/116853/2016). This work was supported by the projects HEALING (POCI-01-0145-FEDER-032036) and CARBOSTEAM (POCI-01-0145-FEDER-032295) funded by FEDER through COMPETE2020-Programa Operacional Competitividade e Internacionalização (POCI) and by national funds through FCT/MCTES, and by the project CICECO-Aveiro Institute of Materials (UIDB/50011/2020 & UIDP/50011/2020) financed by national funds through the FCT/MCTES and when appropriate co-financed by FEDER under the PT2020 Partnership Agreement. E.R.-C. thanks to project RTI2018-099668-BC22 of Ministerio de Ciencia, Innovación y Universidades and FEDER funds. A.Z. gratefully acknowledges financial ˙ support from the Ministry of Science and Higher Education of the Republic of Poland for Statutory Grant CPE/098/STAT-MN-AZ/20 in the Institute of Power Engineering. Partial funding for open access charge: Universidad de Málaga | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | IOAP-MPDI | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | * |
dc.subject | Química Inorgánica | es_ES |
dc.subject.other | Solid oxide fuel cell | es_ES |
dc.subject.other | Solid oxide electrolysis cell | es_ES |
dc.subject.other | Zirconia | es_ES |
dc.subject.other | Manganese oxide | es_ES |
dc.subject.other | Ionic conductivity | es_ES |
dc.subject.other | Thermochemical expansion | es_ES |
dc.subject.other | Oxygen nonstoichiometry | es_ES |
dc.subject.other | Mixed conductor | es_ES |
dc.subject.other | Buffer layer | es_ES |
dc.title | Mixed Ionic-Electronic Conductivity, Redox Behavior and Thermochemical Expansion of Mn-Substituted 5YSZ as an Interlayer Material for Reversible Solid Oxide Cells | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.centro | Facultad de Ciencias | es_ES |
dc.identifier.doi | https://doi.org/10.3390/ma14030641 | |
dc.rights.cc | Atribución 4.0 Internacional | * |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | es_ES |